This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X185, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI100 Standard Cylinder SI100X185
The AirTAC Airtac SI100 Standard Cylinder SI100X185 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 185mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X185, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X185
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI100 Standard Cylinder SI100X185
The AirTAC SI100X185 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 185mm stroke. Delivering 3927N push force at 0.5MPa through a G1/2 port, it is replaced by the SAI100X185. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force and port.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This no-magnet SKU cannot take a sensor. For high heat, Viton H seals raise the limit to 150C.
Airtac SI100 Standard Cylinder SI100X185 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X185 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X185 |
| Bore size | Ø100 mm |
| Stroke | 185 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100X185 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X185 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100X185
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×185 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI100 Standard Cylinder SI100X185 Is Used
Heavy Press Operations
Applies the 3927N push force at 0.5MPa for seating bearings and forming heavy components on automated lines.
Pallet Lift Stations
Lifts loads up to the 200kg vertical limit safely, utilizing the 185mm stroke to raise goods between conveyors.
Clamp Fixtures
Secures large workpieces during machining, relying on the 100mm bore stability and 36mm adjustable cushions.
Replacing the Airtac SI100 Standard Cylinder SI100X185 with the SAI100X185
To replace the SI100X185, order the SAI100X185. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the M20x1.5 rod thread, and the G1/2 port. Since this is a no-S SKU, it cannot accept a CS1-B or DS1-B sensor. If sizing up or down, neighbor bores are 80mm (2513N [email protected]) and 125mm (6136N [email protected]). For stroke lengths >=300mm, use a guide to prevent rod bending. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X185
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100X185 FAQ
Yes, the SI100X185 is discontinued. The direct replacement is the SAI100X185. It shares the identical ISO 15552 mounting interface, 100mm bore, 185mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The G1/2 port feeds a cylinder delivering 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and an 801kgf max at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X185
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X185 replacement — usually within 7-8 hours.